package com.example.homework9;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Sha256 {
    public static void main(String[] args){
        String java = Sha256.getSHA256StrJava("xxxxxxxx");
        System.out.println(java);
    }

    public static  String getSHA256StrJava(String str){
        MessageDigest messageDigest;
        String encodeStr = "";
        try{
            messageDigest = MessageDigest.getInstance("SHA-256");
            messageDigest.update(str.getBytes("UTF-8"));
            encodeStr = byte2Hex(messageDigest.digest());
        }catch (NoSuchAlgorithmException e){
            e.printStackTrace();
        }catch (UnsupportedEncodingException e){
            e.printStackTrace();
        }
        return encodeStr;
    }

    private  static String byte2Hex(byte[] bytes){
        StringBuffer stringBuffer = new StringBuffer();
        String temp = null;
        for(int i=0;i<bytes.length;i++){
            temp = Integer.toHexString(bytes[i]&0xFF);
            if(temp.length()==1){
                stringBuffer.append("0");
            }
            stringBuffer.append(temp);
        }
        return stringBuffer.toString();
    }
}